Flat filtering panel with strong punched cardboard filtering media used: long glass fibre, synthetic mat and in the double layer version of with the two linked together. Suitable for the filtering with environmental and industrial processes dust, over spray painting and as pre.filters of complex systems. Operative temperature up to 70°C and max humidity up to 80%. Substitution recommended at pressure drop 200 Pascal, Max operative ∆P: 250 Pascal. It is easy getting rid of this product, suitable for compressing and, in the synthetic version completely incinerate. Available thickness: 23,48,96, they can be produced in any dimension, standard or not.